<template>
  <span>
    <ui-popover ref="pop" v-model="pop" :placement="placement" width="300" trigger="click">
      <ui-row type="flex" justify="end" class="ui-mb-10" v-if="clearable">
        <ui-button type="danger" icon="ui-icon-delete" size="mini" class="ui-fr" @click="selectIcon()">清空</ui-button>
      </ui-row>
      <ui-input v-model="searchText" :clearable="true" placeholder="搜索 比如 'plus'" prefix-icon="ui-icon-search"></ui-input>
      <ui-collapse v-if="!searchMode" class="ui-icon-select--group" v-model="collapseActive">
        <ui-collapse-item v-for="(item, index) in icon" :key="index" :title="item.title" :name="index" class="ui-icon-select--class">
          <ui-row class="ui-icon-select--class-row">
            <ui-col
              class="ui-icon-select--class-col"
              v-for="(iconName, iconIndex) in item.icon"
              :key="iconIndex"
              :span="4"
              @click.native="selectIcon(iconName)"
            >
              <i :class="'fa fa-' + iconName"></i>
            </ui-col>
          </ui-row>
        </ui-collapse-item>
      </ui-collapse>
      <div v-if="searchMode" class="ui-icon-select--group">
        <div class="ui-icon-select--class" v-for="(item, index) in iconFilted" :key="index">
          <div class="ui-icon-select--class-title">{{ item.title }}</div>
          <ui-row class="ui-icon-select--class-row">
            <ui-col
              class="ui-icon-select--class-col"
              v-for="(iconName, iconIndex) in item.icon"
              :key="iconIndex"
              :span="4"
              @click.native="selectIcon(iconName)"
            >
              <i :class="'fa fa-' + iconName"></i>
            </ui-col>
          </ui-row>
        </div>
      </div>
    </ui-popover>
    <!-- 允许用户输入 -->
    <ui-input v-if="userInput" v-model="currentValue" v-bind="bind" class="max-width">
      <template v-if="value" slot="prepend">
        <i :class="'fa fa-' + value"></i>
      </template>
      <ui-button v-popover:pop slot="append">
        <i class="fa fa-list"></i>
      </ui-button>
    </ui-input>
    <!-- 不允许用户输入 -->
    <ui-button v-popover:pop v-if="!userInput">
      <template v-if="value">
        <i :class="'fa fa-' + value"></i>
      </template>
      {{ value ? value : placeholder }}
    </ui-button>
  </span>
</template>

<script>
import icon from './data/index';
export default {
  name: 'ui-icon-select',
  props: {
    // 值
    value: {
      type: String,
      required: false,
      default: '',
    },
    // 占位符
    placeholder: {
      type: String,
      required: false,
      default: '请选择',
    },
    // 弹出界面的方向
    placement: {
      type: String,
      required: false,
      default: 'right',
    },
    // 是否可清空
    clearable: {
      type: Boolean,
      required: false,
      default: true,
    },
    // 是否允许用户输入
    userInput: {
      type: Boolean,
      required: false,
      default: false,
    },
    // 是否在选择后自动关闭
    autoClose: {
      type: Boolean,
      required: false,
      default: true,
    },
  },
  data() {
    return {
      // 绑定弹出框
      pop: false,
      // 所有图标
      icon,
      // 组件内输入框的值
      currentValue: '',
      // 搜索的文字
      searchText: '',
      // 不是搜索的时候显示的折叠面板绑定的展开数据
      collapseActive: [],
      // collapseActive: [...Array(icon.length)].map((e, i) => i)
    };
  },
  computed: {
    // 输入框上绑定的设置
    bind() {
      return {
        placeholder: this.placeholder,
        clearable: this.clearable,
        ...this.$attrs,
      };
    },
    // 是否在搜索
    searchMode() {
      return !!this.searchText;
    },
    // 过滤后的图标
    iconFilted() {
      return this.icon
        .map((iconClass) => ({
          title: iconClass.title,
          icon: iconClass.icon.filter((icon) => icon.indexOf(this.searchText) >= 0),
        }))
        .filter((iconClass) => iconClass.icon.length > 0);
    },
  },
  watch: {
    value(value) {
      this.currentValue = value;
    },
  },
  created() {
    this.currentValue = this.value;
  },
  methods: {
    selectIcon(iconName = '') {
      this.$emit('input', iconName);
      if (iconName && this.autoClose) {
        this.pop = false;
      }
    },
  },
};
</script>

<style lang="scss">
.ui-icon-select--group {
  max-height: 400px;
  overflow-x: hidden;
  overflow-y: scroll;
  border-top: none;
  border-bottom: none;
  .ui-icon-select--class {
    .ui-icon-select--class-title {
      line-height: 30px;
      text-align: center;
      background-color: $color-bg;
      border-radius: 4px;
      margin: 10px 0px;
    }
    .ui-icon-select--class-row {
      .ui-icon-select--class-col {
        line-height: 40px;
        text-align: center;
        color: $color-text-sub;
        &:hover {
          color: $color-text-main;
          background-color: $color-bg;
          border-radius: 4px;
          font-size: 26px;
          box-shadow: inset 0px 0px 0px 1px $color-border-1;
        }
      }
    }
    .max-width {
      max-width: 240px;
    }
  }
}
</style>
